Discussion North America's most familiar goose. Several subspecies, separable by size and proportions, are recognized; detailed discussion of these is beyond this book's scope and only extremes are dealt with here. Confusingly, intermediates occur between Canada Goose subspecies and Cackling Goose (formerly part of Canada Goose complex), which has recently been assigned species status. Large Canada Geese are unmistakable, but smallest subspecies are similar in size to largest subspecies of Cackling Goose! Neck length is a good feature for separation: proportionately longer in Canada Goose races than in Cackling Goose.